MySQL + KeepAlived + LVS单点写入主主同步高可用架构实验(二)
start)
ifconfig lo:0 $SNS_VIP netmask 255.255.255.255 broadcast $SNS_VIP
/sbin/route add -host $SNS_VIP dev lo:0
echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
sysctl -p >/dev/null 2>&1
echo "RealServer Start OK"
;;
stop)
ifconfig lo:0 down
route del $SNS_VIP >/dev/null 2>&1
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce
echo "RealServer Stoped"
;;
*)
echo "Usage: $0 {start|stop}"
exit 1
esac
exit 0
⑺ 启动 KeepAlived和 realsever
在 ODD EVEN
# /etc/rc.d/init.d/realserver.sh start
# /etc/rc.d/init.d/keepalived start
# echo “/etc/rc.d/init.d/realserver.sh start” >> /etc/rc.local
配置到这边大概都已经差不多了、接下来看看测试
㈥ 简单测试
停掉ODD MySQL Server 、看看能否自动却换到 sorry_server
[plain]
停止前：
[root@odd keepalived]# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.1.128:3306 rr persistent 20
-> 192.168.1.116:3306 Local 3 0 0
停止：
[
mysql@odd ~]$ mysqladmin shutdown
130508 00:53:50 mysqld_safe mysqld from pid file /home/mysql/mysql/data/odd.example.com.pid ended
[1]+ Done mysqld_safe
停止后：
[root@odd keepalived]# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.1.128:3306 rr persistent 20
-> 192.168.1.115:3306 Route 1 0 0
成功！！